feat: (back) Add Dockerfile

backend/Dockerfile

@@ -0,0 +1,36 @@
+# Build stage
+FROM golang:1.24-alpine AS builder
+
+WORKDIR /app
+
+# Install build dependencies if needed (e.g., for CGO, though we disable it)
+RUN apk add --no-cache git
+
+# Copy go mod and sum files
+COPY go.mod go.sum ./
+
+# Download all dependencies. Dependencies will be cached if the go.mod and go.sum files are not changed
+RUN go mod download
+
+# Copy the source from the current directory to the Working Directory inside the container
+COPY . .
+
+# Build the Go app
+RUN CGO_ENABLED=0 GOOS=linux go build -o api cmd/api/main.go
+
+# Start a new stage from scratch
+FROM alpine:latest
+
+WORKDIR /app
+
+# Install ca-certificates (useful for making HTTPS requests)
+RUN apk --no-cache add ca-certificates
+
+# Copy the Pre-built binary file from the previous stage
+COPY --from=builder /app/api .
+
+# Expose port (default 8080, but can be overridden)
+EXPOSE 8080
+
+# Command to run the executable
+CMD ["./api"]