diff --git a/.github/workflows/pta.yml b/.github/workflows/pta.yml
new file mode 100644
index 0000000..6e89b63
--- /dev/null
+++ b/.github/workflows/pta.yml
@@ -0,0 +1,31 @@
+name: Build Booking
+
+on:
+  push:
+    branches: [ "main" ]
+    paths:
+      - 'pom.xml'
+  pull_request:
+    branches: [ "main" ]
+    paths:
+      - 'pom.xml'
+  workflow_dispatch:
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up JDK 21
+      uses: actions/setup-java@v3
+      with:
+        java-version: '21'
+        distribution: 'temurin'
+        cache: maven
+    - name: Build with Maven
+      run: mvn -B package --file pom.xml
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/doc/openapi.json b/doc/openapi.json
deleted file mode 100644
index 4025211..0000000
--- a/doc/openapi.json
+++ /dev/null
@@ -1,282 +0,0 @@
-{
-  "openapi" : "3.0.3",
-  "info" : {
-    "title" : "v API (test)",
-    "description" : "Booking API",
-    "termsOfService" : "Your terms here",
-    "contact" : {
-      "name" : "Example API Support",
-      "url" : "https://ptagency.ch/contact",
-      "email" : "techsupport@ptagency.ch"
-    },
-    "license" : {
-      "name" : "Apache 2.0",
-      "url" : "https://www.apache.org/licenses/LICENSE-2.0.html"
-    },
-    "version" : "1.0.0"
-  },
-  "servers" : [ {
-    "url" : "http://localhost:8080",
-    "description" : "Auto generated value"
-  }, {
-    "url" : "http://0.0.0.0:8080",
-    "description" : "Auto generated value"
-  } ],
-  "paths" : {
-    "/sessions" : {
-      "get" : {
-        "tags" : [ "Session Resource" ],
-        "parameters" : [ {
-          "name" : "from",
-          "in" : "query",
-          "schema" : {
-            "$ref" : "#/components/schemas/LocalDate"
-          }
-        }, {
-          "name" : "to",
-          "in" : "query",
-          "schema" : {
-            "$ref" : "#/components/schemas/LocalDate"
-          }
-        } ],
-        "responses" : {
-          "200" : {
-            "description" : "OK",
-            "content" : {
-              "application/problem+json" : {
-                "schema" : {
-                  "type" : "array",
-                  "items" : {
-                    "$ref" : "#/components/schemas/SessionDto"
-                  }
-                }
-              }
-            }
-          }
-        }
-      }
-    },
-    "/sessions/{id}" : {
-      "get" : {
-        "tags" : [ "Session Resource" ],
-        "parameters" : [ {
-          "name" : "id",
-          "in" : "path",
-          "required" : true,
-          "schema" : {
-            "$ref" : "#/components/schemas/SessionId"
-          }
-        } ],
-        "responses" : {
-          "200" : {
-            "description" : "OK",
-            "content" : {
-              "application/problem+json" : {
-                "schema" : {
-                  "$ref" : "#/components/schemas/SessionDto"
-                }
-              }
-            }
-          }
-        }
-      },
-      "put" : {
-        "tags" : [ "Session Resource" ],
-        "parameters" : [ {
-          "name" : "id",
-          "in" : "path",
-          "required" : true,
-          "schema" : {
-            "$ref" : "#/components/schemas/SessionId"
-          }
-        } ],
-        "responses" : {
-          "200" : {
-            "description" : "OK",
-            "content" : {
-              "application/problem+json" : {
-                "schema" : {
-                  "$ref" : "#/components/schemas/SessionId"
-                }
-              }
-            }
-          }
-        }
-      },
-      "post" : {
-        "tags" : [ "Session Resource" ],
-        "responses" : {
-          "200" : {
-            "description" : "OK",
-            "content" : {
-              "application/problem+json" : {
-                "schema" : {
-                  "$ref" : "#/components/schemas/SessionId"
-                }
-              }
-            }
-          }
-        }
-      },
-      "delete" : {
-        "tags" : [ "Session Resource" ],
-        "parameters" : [ {
-          "name" : "id",
-          "in" : "path",
-          "required" : true,
-          "schema" : {
-            "$ref" : "#/components/schemas/SessionId"
-          }
-        } ],
-        "responses" : {
-          "204" : {
-            "description" : "No Content"
-          }
-        }
-      }
-    },
-    "/sessions/{id}/bookings" : {
-      "get" : {
-        "tags" : [ "Session Resource" ],
-        "parameters" : [ {
-          "name" : "id",
-          "in" : "path",
-          "required" : true,
-          "schema" : {
-            "$ref" : "#/components/schemas/SessionId"
-          }
-        } ],
-        "responses" : {
-          "200" : {
-            "description" : "OK",
-            "content" : {
-              "application/problem+json" : {
-                "schema" : {
-                  "type" : "array",
-                  "items" : {
-                    "$ref" : "#/components/schemas/BookingDto"
-                  }
-                }
-              }
-            }
-          }
-        }
-      }
-    },
-    "/sessions/{id}/bookings/{participant}" : {
-      "post" : {
-        "tags" : [ "Session Resource" ],
-        "parameters" : [ {
-          "name" : "id",
-          "in" : "path",
-          "required" : true,
-          "schema" : {
-            "$ref" : "#/components/schemas/SessionId"
-          }
-        }, {
-          "name" : "participant",
-          "in" : "path",
-          "required" : true,
-          "schema" : {
-            "$ref" : "#/components/schemas/ParticipantId"
-          }
-        } ],
-        "responses" : {
-          "200" : {
-            "description" : "OK",
-            "content" : {
-              "application/problem+json" : {
-                "schema" : {
-                  "$ref" : "#/components/schemas/BookingId"
-                }
-              }
-            }
-          }
-        }
-      },
-      "delete" : {
-        "tags" : [ "Session Resource" ],
-        "parameters" : [ {
-          "name" : "id",
-          "in" : "path",
-          "required" : true,
-          "schema" : {
-            "$ref" : "#/components/schemas/SessionId"
-          }
-        }, {
-          "name" : "participant",
-          "in" : "path",
-          "required" : true,
-          "schema" : {
-            "$ref" : "#/components/schemas/ParticipantId"
-          }
-        } ],
-        "responses" : {
-          "204" : {
-            "description" : "No Content"
-          }
-        }
-      }
-    }
-  },
-  "components" : {
-    "schemas" : {
-      "BookingDto" : {
-        "type" : "object",
-        "properties" : {
-          "session" : {
-            "$ref" : "#/components/schemas/SessionId"
-          },
-          "participant" : {
-            "$ref" : "#/components/schemas/ParticipantId"
-          }
-        }
-      },
-      "BookingId" : {
-        "type" : "object",
-        "properties" : {
-          "session" : {
-            "$ref" : "#/components/schemas/SessionId"
-          },
-          "participant" : {
-            "$ref" : "#/components/schemas/ParticipantId"
-          }
-        }
-      },
-      "LocalDate" : {
-        "format" : "date",
-        "type" : "string",
-        "example" : "2022-03-10"
-      },
-      "ParticipantId" : {
-        "type" : "object",
-        "properties" : {
-          "id" : {
-            "$ref" : "#/components/schemas/UUID"
-          }
-        }
-      },
-      "SessionDto" : {
-        "type" : "object",
-        "properties" : {
-          "id" : {
-            "$ref" : "#/components/schemas/SessionId"
-          }
-        }
-      },
-      "SessionId" : {
-        "type" : "object",
-        "properties" : {
-          "id" : {
-            "$ref" : "#/components/schemas/UUID"
-          }
-        }
-      },
-      "UUID" : {
-        "format" : "uuid",
-        "pattern" : "[a-fA-F0-9]{8}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{12}",
-        "type" : "string"
-      }
-    }
-  }
-}
\ No newline at end of file
diff --git a/doc/openapi.yaml b/doc/openapi.yaml
deleted file mode 100644
index 32c8c46..0000000
--- a/doc/openapi.yaml
+++ /dev/null
@@ -1,194 +0,0 @@
----
-openapi: 3.0.3
-info:
-  title: v API (test)
-  description: Booking API
-  termsOfService: Your terms here
-  contact:
-    name: Example API Support
-    url: https://ptagency.ch/contact
-    email: techsupport@ptagency.ch
-  license:
-    name: Apache 2.0
-    url: https://www.apache.org/licenses/LICENSE-2.0.html
-  version: 1.0.0
-servers:
-- url: http://localhost:8080
-  description: Auto generated value
-- url: http://0.0.0.0:8080
-  description: Auto generated value
-paths:
-  /sessions:
-    get:
-      tags:
-      - Session Resource
-      parameters:
-      - name: from
-        in: query
-        schema:
-          $ref: "#/components/schemas/LocalDate"
-      - name: to
-        in: query
-        schema:
-          $ref: "#/components/schemas/LocalDate"
-      responses:
-        "200":
-          description: OK
-          content:
-            application/problem+json:
-              schema:
-                type: array
-                items:
-                  $ref: "#/components/schemas/SessionDto"
-  /sessions/{id}:
-    get:
-      tags:
-      - Session Resource
-      parameters:
-      - name: id
-        in: path
-        required: true
-        schema:
-          $ref: "#/components/schemas/SessionId"
-      responses:
-        "200":
-          description: OK
-          content:
-            application/problem+json:
-              schema:
-                $ref: "#/components/schemas/SessionDto"
-    put:
-      tags:
-      - Session Resource
-      parameters:
-      - name: id
-        in: path
-        required: true
-        schema:
-          $ref: "#/components/schemas/SessionId"
-      responses:
-        "200":
-          description: OK
-          content:
-            application/problem+json:
-              schema:
-                $ref: "#/components/schemas/SessionId"
-    post:
-      tags:
-      - Session Resource
-      responses:
-        "200":
-          description: OK
-          content:
-            application/problem+json:
-              schema:
-                $ref: "#/components/schemas/SessionId"
-    delete:
-      tags:
-      - Session Resource
-      parameters:
-      - name: id
-        in: path
-        required: true
-        schema:
-          $ref: "#/components/schemas/SessionId"
-      responses:
-        "204":
-          description: No Content
-  /sessions/{id}/bookings:
-    get:
-      tags:
-      - Session Resource
-      parameters:
-      - name: id
-        in: path
-        required: true
-        schema:
-          $ref: "#/components/schemas/SessionId"
-      responses:
-        "200":
-          description: OK
-          content:
-            application/problem+json:
-              schema:
-                type: array
-                items:
-                  $ref: "#/components/schemas/BookingDto"
-  /sessions/{id}/bookings/{participant}:
-    post:
-      tags:
-      - Session Resource
-      parameters:
-      - name: id
-        in: path
-        required: true
-        schema:
-          $ref: "#/components/schemas/SessionId"
-      - name: participant
-        in: path
-        required: true
-        schema:
-          $ref: "#/components/schemas/ParticipantId"
-      responses:
-        "200":
-          description: OK
-          content:
-            application/problem+json:
-              schema:
-                $ref: "#/components/schemas/BookingId"
-    delete:
-      tags:
-      - Session Resource
-      parameters:
-      - name: id
-        in: path
-        required: true
-        schema:
-          $ref: "#/components/schemas/SessionId"
-      - name: participant
-        in: path
-        required: true
-        schema:
-          $ref: "#/components/schemas/ParticipantId"
-      responses:
-        "204":
-          description: No Content
-components:
-  schemas:
-    BookingDto:
-      type: object
-      properties:
-        session:
-          $ref: "#/components/schemas/SessionId"
-        participant:
-          $ref: "#/components/schemas/ParticipantId"
-    BookingId:
-      type: object
-      properties:
-        session:
-          $ref: "#/components/schemas/SessionId"
-        participant:
-          $ref: "#/components/schemas/ParticipantId"
-    LocalDate:
-      format: date
-      type: string
-      example: 2022-03-10
-    ParticipantId:
-      type: object
-      properties:
-        id:
-          $ref: "#/components/schemas/UUID"
-    SessionDto:
-      type: object
-      properties:
-        id:
-          $ref: "#/components/schemas/SessionId"
-    SessionId:
-      type: object
-      properties:
-        id:
-          $ref: "#/components/schemas/UUID"
-    UUID:
-      format: uuid
-      pattern: "[a-fA-F0-9]{8}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{12}"
-      type: string