add missing dependencies and switch CI base container

.gitlab-ci.yml

-image: python:3-buster
+image: debian:buster-slim
+
+variables:
+  PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip"
+cache:
+  paths:
+    - .cache/pip
+    - venv/
 
 before_script:
-  - python3 -V
+  - apt-get update
+  - apt-get install -y python3 git python3-pip
+  - pip3 install virtualenv
+  - virtualenv venv
+  - source venv/bin/activate
+  - pip3 install .
   - pip3 install pytest-cov
   - pip3 install .[tests]
-  - pip3 install .
 
 formatting:
   script:

setup.py

@@ -10,7 +10,10 @@ setup(
     description="",
     license="AGPLv3+",
     extras_require={"tests": test_requirements},
-    install_requires=[],
+    install_requires=[
+        "openquake.engine",
+        "geopandas",
+    ],
     packages=find_packages(),
     python_requires=">=3.7",
 )

shakyground2/site_model.py

@@ -24,7 +24,7 @@ SITE_PROPERTIES = {
     "backarc": np.bool,  # Site is in the subduction backarc (True) or else
     "region": np.int32,  # Region to which the site belongs
     "geology": (np.string_, 20)  # Geological classification for the site
-}  
+}
 
 
 # In some cases reasonable default values can be used for relevant ground motion models