Create Dockerfile

This Dockerfile sets up a multi-stage build for a web application:

    The first stage compiles the Golang backend code and creates a 'main' binary.
    The second stage handles frontend asset compilation, specifically converting SCSS to CSS using SASS.
    Finally, it combines the Golang binary and compiled CSS into a final image, ready to run the web application on port 8080.

Signed-off-by: pushpit kamboj <[email protected]>

Dockerfile

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+# Stage 1: Build Golang backend
+FROM golang:latest AS backend
+
+WORKDIR /app
+
+# Copy and build the Golang application
+COPY . .
+RUN go build -o main ./*.go
+
+# Stage 2: Build frontend assets (SCSS to CSS)
+FROM node:latest AS frontend
+
+WORKDIR /app
+
+# Copy only the necessary frontend files (SCSS, etc.)
+COPY . .
+
+# Install dependencies and compile SCSS to CSS
+RUN npm install -g sass   # Install SASS globally
+RUN sass input.scss output.css   # Replace with your SCSS compilation command
+
+# Stage 3: Final stage
+FROM golang:latest
+
+WORKDIR /app
+
+# Copy the built Golang binary from the first stage
+COPY --from=backend /app/main .
+
+# Copy the compiled CSS files from the second stage
+COPY --from=frontend /app/output.css ./public/output.css
+
+# Expose the port your web application runs on (if applicable)
+EXPOSE 8080
+
+# Set the default command to start the web server 
+CMD ["./main"]
+
+
+#if you are more familiar with CCS for frontend development than SCSS use these instruction 
+# Install dependencies and compile SCSS to CSS
+RUN npm install -g sass   # Install SASS globally (if using Node.js)
+RUN sass input.scss output.css   # Replace with your SCSS compilation command