Add a Ajna watcher stack (#781)

Part of https://www.notion.so/Generate-ajna-finance-subgraph-watcher-with-codegen-5b80ac149b3f449fb138f5d92cc5485e

Reviewed-on: cerc-io/stack-orchestrator#781
Co-authored-by: Prathamesh Musale <prathamesh.musale0@gmail.com>
Co-committed-by: Prathamesh Musale <prathamesh.musale0@gmail.com>

stack_orchestrator/data/container-build/cerc-watcher-ajna/Dockerfile

@@ -0,0 +1,10 @@
+FROM node:18.17.1-alpine3.18
+
+RUN apk --update --no-cache add git python3 alpine-sdk bash curl jq
+
+WORKDIR /app
+
+COPY . .
+
+RUN echo "Installing dependencies and building ajna-watcher-ts" && \
+  yarn && yarn build

stack_orchestrator/data/container-build/cerc-watcher-ajna/build.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+# Build cerc/watcher-ajna
+
+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-ajna:local -f ${SCRIPT_DIR}/Dockerfile ${build_command_args} ${CERC_REPO_BASE_DIR}/ajna-watcher-ts