feat(inference): add Dockerfile for the inference stack's text client 🐋

Initial definition of the inference stack's text client container image.

docker/inference/Dockerfile.text-client

@@ -0,0 +1,46 @@
+# syntax=docker/dockerfile:1
+
+ARG APP_USER="text-client"
+ARG APP_RELATIVE_PATH="inference/text-client"
+
+
+FROM python:3.10-alpine3.17 as build
+ARG APP_RELATIVE_PATH
+
+WORKDIR /build
+
+COPY ./${APP_RELATIVE_PATH}/requirements.txt .
+
+RUN --mount=type=cache,target=/var/cache/pip \
+    pip install                  \
+      --cache-dir=/var/cache/pip \
+      --target=lib               \
+      -r requirements.txt
+
+
+
+FROM python:3.10-alpine3.17 as dev
+ARG APP_USER
+ARG APP_RELATIVE_PATH
+
+ENV APP_ROOT="/opt/${APP_RELATIVE_PATH}"
+ENV APP_LIBS="/var/opt/${APP_RELATIVE_PATH}/lib"
+
+ENV PATH="${PATH}:${APP_LIBS}/bin"
+ENV PYTHONPATH="${PYTHONPATH}:${APP_LIBS}"
+
+
+RUN adduser               \
+      --disabled-password \
+      --no-create-home    \
+      "${APP_USER}"
+
+USER ${APP_USER}
+
+WORKDIR ${APP_ROOT}
+
+COPY --chown="${APP_USER}:${APP_USER}" --from=build /build/lib                         ${APP_LIBS}
+COPY --chown="${APP_USER}:${APP_USER}"              ./${APP_RELATIVE_PATH}/__main__.py .
+
+
+CMD python3 __main__.py --backend-url "${BACKEND_URL}"