Containerisation of the API works.

Dockerfile

-FROM golang:1.16.2-buster
-WORKDIR .
+# Start from golang base image
+FROM golang:alpine
+
+# The latest alpine images don't have some tools like (`git` and `bash`).
+# Adding git, bash and openssh to the image
+RUN apk update && apk upgrade && \
+    apk add --no-cache bash git openssh build-base
+
+# Set the current working directory inside the container 
+WORKDIR /app
+
+# Copy go mod and sum files 
+COPY go.mod go.sum ./
+
+# Download all dependencies. Dependencies will be cached if the go.mod and the 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 . .
-RUN make build
-RUN make build file=example.json
+
+# Build the Go app
\ No newline at end of file
+RUN go build
+
+# Expose port 8080 to the outside world
+EXPOSE 8080
+
+RUN chmod +x /app/json-utility
+#Command to run the executable
+CMD ["./json-utility", "CONTAINER"]
\ No newline at end of file

docker-compose.yaml

+version: "3"
+services:
+  app:
+    container_name: rest-api-json
+    build: .
+    restart: on-failure
+    volumes:
+      - .:/usr/src/app/
+    ports: 
+      - 8080:8080