fix: add necessary ldflags

rockcraft.yaml

@@ -48,7 +48,17 @@ parts:
     source-type: git
     source-tag: v1.3.3
     override-build: |
-      go build -o ${CRAFT_PART_INSTALL}/bin/openfga ./cmd/openfga
+      build_ver="${src_config_path}/config.Version"
+      build_hash="${src_config_path}/config.Commit"
+      build_date="${src_config_path}/config.Date"
+      go_linker_flags="-s \
+                       -w \
+                       -X ${build_ver}=$(git -C "${CRAFT_PART_SRC}" describe --tags) \
+                       -X ${build_hash}=$(git -C "${CRAFT_PART_SRC}" rev-parse HEAD) \
+                       -X ${build_date}=$(date -u +%Y-%m-%dT%H:%M:%SZ)"
+
+      go mod download
+      go build -ldflags="${go_linker_flags}" -o ${CRAFT_PART_INSTALL}/bin/openfga ./cmd/openfga
 
   grpc_health_probe:
     plugin: go