Added multiple -r flags instead of dependency chaining

.gitignore

@@ -6,4 +6,4 @@
 __pycache__
 *.py[oc]
 /venv
-.DS_Store
+.DS_Store

httpobs/Dockerfile

@@ -11,8 +11,12 @@ WORKDIR /app
 
 COPY . httpobs
 
-RUN pip install --upgrade --no-cache-dir -r httpobs/requirements.txt
+RUN pip install --upgrade --no-cache-dir \
+    -r httpobs/requirements.txt \
+    -r httpobs/database/requirements.txt \
+    -r httpobs/scanner/requirements.txt \
+    -r httpobs/website/requirements.txt
 
 ENV PYTHONPATH $PYTHONPATH:/app
 
-USER app
+USER app

httpobs/requirements.txt

@@ -19,6 +19,3 @@ pyflakes==1.5.0
 pytz==2017.2
 vine==1.1.3
 Werkzeug==0.12.1
--r database/requirements.txt
--r scanner/requirements.txt
--r website/requirements.txt

requirements.txt

@@ -1 +1,4 @@
 -r httpobs/requirements.txt
+-r httpobs/database/requirements.txt
+-r httpobs/scanner/requirements.txt
+-r httpobs/website/requirements.txt