Add Dockerfile and Tofu installation script

* Add .dockerignore
* Add Dockefile
* Add Tofu installation

.dockerignore

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+.github/
+docs/
+
+# Example files for tofu and infrastructure configurations (e.g. .tf files)
+examples/
+
+# Terrafrom files
+*.tfstate
+*.tfstate.backup
+*.tfvars
+.terraform/
+.terraform.lock.hcl
+
+# Secret files
+*credential*
+
+# Binaries
+pkg/poc-mc-net-tf
+pkg/poc-mc-net-tf-arm
+cmd/poc-mc-net-tf/poc-mc-net-tf
+
+# Log files
+log/
+logs/
+*.log
+
+# Files for tofu and infrastructure configurations
+!.tofu/
+.tofu/*
+!.tofu/secrets
+.tofu/secrets/*
+!.tofu/secrets/.keep
+!.tofu/template-tfs

Dockerfile

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+##############################################################
+## Stage 1 - Go Build
+##############################################################
+
+# Using a specific version of golang based on alpine for building the application
+FROM golang:1.21.4-alpine AS builder
+
+# Installing necessary packages
+# sqlite-libs and sqlite-dev for SQLite support
+# build-base for common build requirements
+RUN apk add --no-cache sqlite-libs sqlite-dev build-base
+
+# Copying only necessary files for the build
+COPY . /go/src/github.com/cloud-barista/poc-mc-net-tf
+WORKDIR /go/src/github.com/cloud-barista/poc-mc-net-tf
+# COPY go.mod go.sum go.work go.work.sum ./
+RUN go mod download
+# COPY .tofu ./.tofu
+# COPY cmd ./cmd
+# COPY conf ./conf
+# COPY pkg ./pkg
+
+# Building the Go application with specific flags
+# Note - "make prod" executes the command, 
+# CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -ldflags '-s -w' -o poc-mc-net-tf"
+RUN make prod
+
+#############################################################
+## Stage 2 - Application Setup
+##############################################################
+
+# Using the latest Ubuntu image for the production stage
+FROM ubuntu:latest as prod
+
+# Setting the working directory for the application
+WORKDIR /app
+
+# Copying necessary files from the builder stage to the production stage
+# Assets, scripts, and configuration files are copied excluding credentials.conf
+# which should be specified in .dockerignore
+COPY --from=builder /go/src/github.com/cloud-barista/poc-mc-net-tf/.tofu/ /app/.tofu/
+COPY --from=builder /go/src/github.com/cloud-barista/poc-mc-net-tf/conf/ /app/conf/
+COPY --from=builder /go/src/github.com/cloud-barista/poc-mc-net-tf/scripts/ /app/scripts/
+COPY --from=builder /go/src/github.com/cloud-barista/poc-mc-net-tf/cmd/poc-mc-net-tf/poc-mc-net-tf /app/
+
+RUN ./scripts/install-tofu.sh
+
+# Setting various environment variables required by the application
+ENV POCMCNETTF_ROOT=/app \
+    LOGFILE_PATH=poc-mc-net-tf.log \
+    LOGFILE_MAXSIZE=10 \
+    LOGFILE_MAXBACKUPS=3 \
+    LOGFILE_MAXAGE=30 \
+    LOGFILE_COMPRESS=false \
+    LOGLEVEL=debug \
+    LOGWRITER=both \
+    NODE_ENV=development \
+    DB_URL=localhost:3306 \
+    DB_DATABASE=poc_mc_net_tf \
+    DB_USER=poc_mc_net_tf \
+    DB_PASSWORD=poc_mc_net_tf \
+    API_ALLOW_ORIGINS=* \
+    API_AUTH_ENABLED=true \
+    API_USERNAME=default \
+    API_PASSWORD=default \
+    AUTOCONTROL_DURATION_MS=10000 \
+    SELF_ENDPOINT=localhost:8888 \
+    API_DOC_PATH=/app/pkg/api/rest/docs/swagger.json
+
+# Setting the entrypoint for the application
+ENTRYPOINT [ "/app/poc-mc-net-tf" ]
+
+# Exposing the port that the application will run on
+EXPOSE 8888

scripts/install-tofu.sh

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+# Ensure that your system is up to date
+apt update -y
+
+# Ensure that you have installed the dependencies, such as `gnupg`, `software-properties-common`, `curl`, and unzip packages.
+apt install -y curl 
+
+# Download the installer script:
+curl --proto '=https' --tlsv1.2 -fsSL https://get.opentofu.org/install-opentofu.sh -o install-opentofu.sh
+# Alternatively: wget --secure-protocol=TLSv1_2 --https-only https://get.opentofu.org/install-opentofu.sh -O install-opentofu.sh
+
+# Give it execution permissions:
+chmod +x install-opentofu.sh
+
+# Please inspect the downloaded script
+
+# Run the installer:
+./install-opentofu.sh --install-method deb
+
+# Remove the installer:
+rm install-opentofu.sh