Hot reloading gin gonic with docker

Dockerfile.backend

@@ -26,4 +26,9 @@ FROM base AS dev
 # Install air for hot reloading
 RUN go install github.com/air-verse/air@latest
 
+# Copy code, and expose port
+COPY . .
+EXPOSE 8080
 
+# Enable hot reloading for go
+CMD [ "air" ]

backend/.gitignore

@@ -0,0 +1 @@
+tmp

backend/controllers/users.go

@@ -27,7 +27,7 @@ func (u *User) Register(c *gin.Context) {
 	validate := validator.New()
 	if err := validate.Struct(data); err != nil {
 		// Handle error
-		log.Fatalf("Error: %v", err.Error())
+		log.Printf("[ERROR]: %v", err.Error())
 	}
 
 	// fmt.Println(data)

development.yml

@@ -3,9 +3,12 @@ services:
     build:
       context: ./backend
       dockerfile: ../Dockerfile.backend
+      target: dev # Development mode with hot reload
     restart: unless-stopped
     container_name: cover-letter-backend
 
+    volumes:
+      - "./backend:/app"
     environment:
       - GIN_MODE=debug
       # - GIN_MODE=release # For production