create dockerfile (#36)

hmruntime/Dockerfile

@@ -0,0 +1,13 @@
+FROM golang:alpine as builder
+LABEL maintainer="Hypermode <hello@hypermode.com>"
+
+# build hmruntime binary
+WORKDIR /src
+COPY go.mod go.sum ./
+COPY *.go ./
+RUN go build .
+
+FROM ubuntu:20.04
+
+COPY --from=builder /src/hmruntime /usr/bin/hmruntime
+CMD ["hmruntime"]

hmruntime/README.md

@@ -14,10 +14,13 @@ The following must be installed on your development workstation or build server:
 
 To build the Hypermode runtime server: `go build`
 
+To build the docker image: `docker build -t hmruntime .`
+
 ## Running
 
 - To run the compiled program, invoke the `hmruntime` binary.
 - To run from code (while developing), use `go run .` instead.
+- To run using docker containers, use `docker run -p 8686:8686 -v <PLUGINS_PATH>:/plugins hmruntime:latest hmruntime --dgraph=http://host.docker.internal:8080`.
 
 ## Notes
 

hmruntime/dgraph.go

@@ -17,7 +17,7 @@ import (
 func executeDQL(ctx context.Context, stmt string, isMutation bool) ([]byte, error) {
 	reqBody := strings.NewReader(stmt)
 
-	host := "http://localhost:8080" // TODO: make this configurable
+	host := *dgraphUrl
 	var endpoint, contentType string
 	if isMutation {
 		endpoint = "/mutate?commitNow=true"
@@ -47,7 +47,7 @@ func executeDQL(ctx context.Context, stmt string, isMutation bool) ([]byte, erro
 
 func executeGQL(ctx context.Context, stmt string) ([]byte, error) {
 	reqBody := strings.NewReader(stmt)
-	resp, err := http.Post("http://localhost:8080/graphql", "application/graphql", reqBody)
+	resp, err := http.Post(fmt.Sprintf("%s/graphql", *dgraphUrl), "application/graphql", reqBody)
 	if err != nil {
 		return nil, fmt.Errorf("error posting GraphQL statement: %v", err)
 	}

hmruntime/main.go

@@ -31,11 +31,14 @@ var compiledModules = make(map[string]wazero.CompiledModule)
 // map that holds the function info for each resolver
 var functionsMap = make(map[string]functionInfo)
 
+var dgraphUrl *string
+
 func main() {
 	ctx := context.Background()
 
 	// Parse command-line flags
 	var port = flag.Int("port", 8686, "The HTTP port to listen on.")
+	dgraphUrl = flag.String("dgraph", "http://localhost:8080", "The Dgraph url to connect to.")
 	flag.Parse()
 
 	// Initialize the WebAssembly runtime