fix(docker): Ensure /install directory is created in builder stage (#12)

The Docker build was failing in the GitHub Actions workflow because the /install directory was not being created in the builder stage when there were no production dependencies. This change ensures the directory is always created, preventing the COPY command from failing.

Author: gowthamrao

Dockerfile

@@ -12,7 +12,8 @@ COPY pyproject.toml poetry.lock* ./
 COPY src/ ./src/
 
 # Export dependencies and install them
-RUN poetry export -f requirements.txt --output requirements.txt --without-hashes && \
+RUN mkdir -p /install && \
+    poetry export -f requirements.txt --output requirements.txt --without-hashes && \
     pip install --no-cache-dir --prefix="/install" -r requirements.txt