feat: add Dockerfile and buildspec for offchain price pusher

infra/price-pusher/offchain/Dockerfile

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+FROM python:3.12-slim AS base
+
+ENV PYTHONUNBUFFERED=1 \
+     PYTHONDONTWRITEBYTECODE=1 \
+     PIP_NO_CACHE_DIR=off \
+     PIP_DISABLE_PIP_VERSION_CHECK=on \
+     PIP_DEFAULT_TIMEOUT=100
+
+ENV PATH="/root/.local/bin:${PATH}"
+
+FROM base as builder
+
+RUN apt-get update &&
+     apt-get install --no-install-recommends -y \
+          gcc \
+          libgmp3-dev \
+          pipx
+
+RUN pipx install uv
+COPY pragma-sdk/ /opt/pragma-sdk/
+COPY pragma-utils/ /opt/pragma-utils/
+COPY price-pusher/ /opt/price-pusher/
+WORKDIR /opt/price-pusher
+RUN uv sync --all-extras
+
+FROM base as final
+COPY --from=builder /opt /opt
+COPY infra/price-pusher/config/ /opt/price-pusher/config/
+WORKDIR /opt/price-pusher
+ENTRYPOINT /opt/price-pusher/.venv/bin/python3.12 price_pusher/main.py -c ${CONFIG_PATH} -t ${TARGET} -n ${NETWORK} -p ${PRIVATE_KEY} --publisher-name ${PUBLISHER_NAME} --publisher-address ${PUBLISHER_ADDRESS} --api-key ${API_KEY} --api-base-url ${API_BASE_URL}

infra/price-pusher/offchain/buildspec.yml

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+version: 0.2
+phases:
+  pre_build:
+    commands:
+      - echo Logging in to Amazon ECR...
+      - aws --version
+      - aws ecr get-login-password --region $ECR_REGION | docker login --username AWS --password-stdin $AWS_ACCOUNT_ID.dkr.ecr.$ECR_REGION.amazonaws.com
+      - REPOSITORY_URI=$AWS_ACCOUNT_ID.dkr.ecr.$ECR_REGION.amazonaws.com/$ECR_REPOSITORY_NAME
+      - COMMIT_HASH=$(echo $CODEBUILD_RESOLVED_SOURCE_VERSION | cut -c 1-7)
+      - IMAGE_TAG=${COMMIT_HASH:=latest}
+  build:
+    commands:
+      - echo Build started on `date`
+      - echo Building the Docker image...
+      - ls -ltr
+      - docker build -f infra/price-pusher/offchain/Dockerfile -t $REPOSITORY_URI:latest .
+      - docker tag $REPOSITORY_URI:latest $REPOSITORY_URI:$IMAGE_TAG
+  post_build:
+    commands:
+      - echo Build completed on `date`
+      - echo Pushing the Docker images...
+      - docker push $REPOSITORY_URI:latest
+      - docker push $REPOSITORY_URI:$IMAGE_TAG
+      - echo Writing image definitions file...
+      - printf '[{"name":"%s","imageUri":"%s"}]' $ECS_CONTAINER_NAME $REPOSITORY_URI:$IMAGE_TAG > imagedefinitions.json
+artifacts:
+  files:
+    - imagedefinitions.json
+    - infra/price-pusher/offchain/config.yml
+  discard-paths: yes

infra/price-pusher/offchain/config.yml

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+path: "/"
+container_port: 8080
+health_check_path: "/"
+container_environment:
+  - region: "eu-west-3"
+  - prefix: "/conf/{{ SERVICE_NAME }}/{{ RUN_ENV }}"
+  - keys:
+      - CONFIG_PATH
+      - TARGET
+      - NETWORK
+      - PRIVATE_KEY
+      - PUBLISHER_NAME
+      - PUBLISHER_ADDRESS
+      - API_KEY
+      - API_BASE_URL