Add dockerfile

Dockerfile

@@ -0,0 +1,33 @@
+FROM mambaorg/micromamba:2.0.5-alpine3.20
+
+# necessary to display the image on Github
+LABEL org.opencontainers.image.source="https://github.com/shirte/nerdd"
+
+USER root
+
+# rdkit requires libxrender, libxext-dev, libxau and g++
+RUN apk update && apk add libxrender libxext-dev libxau g++
+
+# Necessary, so Docker doesn't buffer the output and that we can see the output 
+# of the application in real-time.
+ENV PYTHONUNBUFFERED 1
+
+WORKDIR /app
+
+# create the conda environment
+COPY environment.yml .
+RUN micromamba env create -f environment.yml
+
+COPY . .
+
+# --mount=type=cache,target=/root/.cache/pip: create a cache directory for pip, so that
+# it doesn't have to download the dependencies every time we build the image
+RUN --mount=type=cache,target=/root/.cache/pip \
+    micromamba run -n nerdd_backend pip install .
+
+# --no-capture-output: output of the application is not buffered and we can see it 
+# Note: PYTHONUNBUFFERED is not enough, because it only affects the Python
+# standard output, not the output of the application.
+ENTRYPOINT micromamba run -n nerdd_backend \
+    python -m nerdd_backend.main --config-name production \
+    ++db.host=$RETHINK_DB_HOST ++db.port=$RETHINK_DB_PORT ++channel.broker_url=$KAFKA_BROKER_URL