build(docker): update Dockerfile

.gitignore

@@ -21,6 +21,10 @@ dist/
 coverage.txt
 coverage.out
 
+# Environments
+.env
+.env.dev
+
 # vscode
 .vscode/*
 !.vscode/settings.json

Dockerfile

@@ -1,20 +1,24 @@
 # Build the application from source.
 FROM golang:1.21.6-alpine@sha256:fd78f2fb1e49bcf343079bbbb851c936a18fc694df993cbddaa24ace0cc724c5 AS go-builder
 
+ENV GOCACHE="/cache/go-build"
+
 WORKDIR /app
+
 COPY go.mod go.sum cmd ./
-RUN go build -o /app/dist/deadnews-template-go ./...
+RUN --mount=type=cache,target=${GOCACHE} \
+    go build -o /app/dist/deadnews-template-go ./...
 
 # Deploy the application binary into a lean image.
 FROM gcr.io/distroless/static-debian12:latest@sha256:4a2c1a51ae5e10ec4758a0f981be3ce5d6ac55445828463fce8dff3a355e0b75 AS runtime
 LABEL maintainer "DeadNews <aurczpbgr@mozmail.com>"
 
-ENV PORT=1271
+ENV GO_PORT=1271
 
 COPY --from=go-builder /app/dist/deadnews-template-go /usr/local/bin/deadnews-template-go
 
 USER nonroot:nonroot
-EXPOSE ${PORT}
+EXPOSE ${GO_PORT}
 HEALTHCHECK NONE
 
 CMD ["deadnews-template-go"]

cmd/deadnews-template-go/main.go

@@ -10,14 +10,14 @@ import (
 
 // This code is the main function of a Go program
 // that creates and starts a server using the Echo framework.
-// It retrieves the value of the "PORT" environment variable
+// It retrieves the value of the "GO_PORT" environment variable
 // and if it is not set, it defaults to port 1271.
 func main() {
 	// Create a new Echo instance.
 	e := makeServer()
 
-	// Get the value of the "PORT" environment variable.
-	httpPort := os.Getenv("PORT")
+	// Get the value of the "GO_PORT" environment variable.
+	httpPort := os.Getenv("GO_PORT")
 	if httpPort == "" {
 		httpPort = "1271"
 	}

docker-compose.yml

@@ -3,6 +3,6 @@ services:
   web:
     build: .
     ports:
-      - 1271:1271
+      - 127.0.0.1:${GO_PORT:-1271}:${GO_PORT:-1271}
     environment:
-      PORT: "1271"
+      GO_PORT: ${GO_PORT:-1271}