Updated README and added makefile to ease updates

IMAGE=thetorproject/snowflake-proxy

.PHONY: tag

tag:

	@[ "${VERSION}" ] || ( echo "Env var VERSION is not set."; exit 1 )

	docker tag $(IMAGE) $(IMAGE):$(VERSION)

	docker tag $(IMAGE) $(IMAGE):latest

.PHONY: release

release:

	@[ "${VERSION}" ] || ( echo "Env var VERSION is not set."; exit 1 )

	docker push $(IMAGE):$(VERSION)

	docker push $(IMAGE):latest

.PHONY: build

build:

	docker build -t $(IMAGE) .

.PHONY: deploy

deploy:

	docker-compose up -d snowflake-proxy

#### Building and Running:

#### To run this docker container:

``` 

docker-compose up

docker-compose up -d

```

#### To Re-build and Run:

#### Releasing a new image

First, build the image:

```

docker-compose up --build 

make build

```

Next, release a new version by adding a tag:

```

make tag VERSION=X.Y

```

Finally, release the image:

```

make release VERSION=X.Y

```

Once we released a new image version, we tag the respective git commit:

```

git tag -a -s "vVERSION" -m "Docker image version VERSION"

git push --tags origin main

```

#### Adding Custom URLs: