diff --git a/README.md b/README.md
index b526158..35679df 100644
--- a/README.md
+++ b/README.md
@@ -1,34 +1,67 @@
-# Database
+# Goslar Event Prototype
 
+Website prototype using Python, Flask and Postgres running on Heroku.
+
+## Setup
+
+### Environment variables
+
+Create `.env` file in the root directory and define the following variables:
+
+```
+DATABASE_URL=
+GOOGLE_OAUTH_CLIENT_ID=
+GOOGLE_OAUTH_CLIENT_SECRET=
+OAUTHLIB_INSECURE_TRANSPORT=true
+OAUTHLIB_RELAX_TOKEN_SCOPE=true
+GOOGLE_MAPS_API_KEY=
+```
+
+## Development
+
+### Database
+
+```
 python manage.py db init
 python manage.py db migrate
 python manage.py db upgrade
+```
 
-## Development only
+#### Local development only
 
+```
 python manage.py db history
 python manage.py db downgrade
 // reset git: migrations/versions
 python manage.py db migrate
 python manage.py db upgrade
+```
 
-## Kill local detached server
+### Kill local detached server
 
+```
 lsof -i :5000
 kill -9 PIDNUMBER
+```
 
-## i18n
+### i18n
 
 <https://pythonhosted.org/Flask-BabelEx/>
 
-## Init
+#### Init
 
+```
 pybabel extract -F babel.cfg -o messages.pot . && pybabel extract -F babel.cfg -k lazy_gettext -o messages.pot . && pybabel init -i messages.pot -d translations -l de
+```
 
-## Neue msgid's scannen und in *.po mergen
+#### Neue msgid's scannen und in *.po mergen
 
+```
 pybabel extract -F babel.cfg -o messages.pot . && pybabel extract -F babel.cfg -k lazy_gettext -o messages.pot . && pybabel update -i messages.pot -d translations
+```
 
-## Nach dem Übersetzen
+#### Nach dem Übersetzen
 
+```
 pybabel compile -d translations
+```
diff --git a/app.py b/app.py
index 1a7c902..6184792 100644
--- a/app.py
+++ b/app.py
@@ -94,6 +94,11 @@ def get_localized_enum_name(enum):
 
 app.jinja_env.filters['loc_enum'] = lambda u: get_localized_enum_name(u)
 
+def env_override(value, key):
+  return os.getenv(key, value)
+
+app.jinja_env.filters['env_override'] = env_override
+
 def print_dynamic_texts():
     gettext('Event_Art')
     gettext('Event_Book')
diff --git a/runlocal.sh b/runlocal.sh
index ba63400..2420e4e 100755
--- a/runlocal.sh
+++ b/runlocal.sh
@@ -1,3 +1,4 @@
 export DATABASE_URL="postgresql://daniel@localhost/gsevpt"
+export GOOGLE_MAPS_API_KEY="***REMOVED***"
 #pip install -r requirements.txt
 flask run --host 0.0.0.0
\ No newline at end of file
diff --git a/templates/_macros.html b/templates/_macros.html
index 2da465c..9f18b6a 100644
--- a/templates/_macros.html
+++ b/templates/_macros.html
@@ -406,7 +406,7 @@
 {% endmacro %}
 
 {% macro render_google_place_autocomplete_header(location_only = False) %}
-<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?key=***REMOVED***&libraries=places"></script>
+<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?key={{ "dev" | env_override('GOOGLE_MAPS_API_KEY') }}&libraries=places"></script>
 <script>
     function initialize() {
       var input = document.getElementById('location_search');