Modified the docker file to build properly

Dockerfile

@@ -1,22 +1,22 @@
 FROM golang:alpine
 
 # Set necessary environmet variables needed for our image
-ENV GO111MODULE=on \
+ENV GO111MODULE=auto \
     CGO_ENABLED=0 \
     GOOS=linux \
     GOARCH=amd64
 
+WORKDIR /app
+
+COPY go.mod .
+COPY go.sum .
+
+RUN go mod download
+
 # Copy the code into the container
 COPY . .
 
 # Build the application
-RUN go build -o main .
-
-# Move to /dist directory as the place for resulting binary folder
-WORKDIR /dist
-
-# Copy binary from build to main folder
-RUN cp /build/main .
+RUN go build
 
-# Command to run when starting the container
-CMD ["/dist/main"]    
+ENTRYPOINT ["/app/main"]