Add Dockerfile

Dockerfile

@@ -1,30 +1,33 @@
-# Start from the latest golang base image
-FROM golang:alpine
+# Build Stage
+FROM golang:alpine AS builder
 
-# Add Maintainer Info
-LABEL org.opencontainers.image.source=https://github.com/chefgs/linktoqr
-LABEL description="This container image can be used to generate QR from the given URL or Text."
-LABEL org.opencontainers.image.licenses=MIT
+# Set environment variables to make builds more efficient
+ENV CGO_ENABLED=0 GOOS=linux GO111MODULE=on
 
-# Set necessary environment variables needed for our image
-ENV CGO_ENABLED=0 \
-    GOOS=linux \
-    GOOS=darwin \
-    GO111MODULE=on
-
-
-# Move to working directory /linktoqr
+# Set working directory
 WORKDIR /linktoqr
 
-# Copy and download dependency using go mod
-COPY go.mod .
+# Copy go.mod and go.sum to download dependencies
+COPY go.mod ./
 RUN go mod tidy
 
-# Copy the code into the container
+# Copy the source code into the container
 COPY . .
 
-# Export necessary port
+# Build the binary using main.go from the specified location
+RUN go build -o linktoqr ./main/main.go
+
+# Final Stage
+FROM alpine:latest
+
+# Set working directory
+WORKDIR /linktoqr
+
+# Copy only the compiled binary from the builder stage
+COPY --from=builder /linktoqr/linktoqr .
+
+# Expose the port for the application
 EXPOSE 1718
 
-# Command to run the executable
-CMD ["go", "run", "./..."]
+# Command to run the application
+CMD ["./linktoqr"]