Add stack for azimuth watchers with gateway-server (#379)

* Setup gateway-server with watchers

* Add js script to merge toml config files

* Remove individual watcher configs

* Add all azimuth watchers in stack

* Fix toml-js install

* Use env variables for ipld-eth-server endpoints

* Checkout to version tag in azimuth-watcher-ts repo

Former-commit-id: 5a94aed7f7e150381c0a49a3bcc5b43763333151

app/data/container-build/cerc-watcher-azimuth/Dockerfile

@@ -0,0 +1,13 @@
+FROM node:18.16.0-alpine3.16
+
+RUN apk --update --no-cache add git python3 alpine-sdk
+
+WORKDIR /app
+
+COPY . .
+
+RUN echo "Building azimuth-watcher-ts" && \
+    yarn && yarn build
+
+RUN echo "Install toml-js to update watcher config files" && \
+    yarn add --dev --ignore-workspace-root-check toml-js

app/data/container-build/cerc-watcher-azimuth/build.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+# Build cerc/watcher-azimuth
+
+source ${CERC_CONTAINER_BASE_DIR}/build-base.sh
+
+# See: https://stackoverflow.com/a/246128/1701505
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+
+docker build -t cerc/watcher-azimuth:local -f ${SCRIPT_DIR}/Dockerfile ${build_command_args} ${CERC_REPO_BASE_DIR}/azimuth-watcher-ts