Dockerised. Restructured to remove circular import

Moved most of app definitions out of guard function to use wsgi
Updated configuration files and referencing of .env values.
Local version needs dotenv or exporting of env variables.
Dockerised version works fine without load_dotenv.
Ready to test now!

ref-test/common/data_tools.py

@@ -6,35 +6,38 @@ from glob import glob
 from random import shuffle
 from werkzeug.utils import secure_filename
 
-from main import app, db
 from .security.database import decrypt_find_one
 
 def check_data_folder_exists():
+    from main import app
     if not os.path.exists(app.config['DATA_FILE_DIRECTORY']):
         pathlib.Path(app.config['DATA_FILE_DIRECTORY']).mkdir(parents='True', exist_ok='True')
 
 def check_default_indicator():
+    from main import app
     if not os.path.isfile(os.path.join(app.config['DATA_FILE_DIRECTORY'], '.default.txt')):
         open(os.path.join(app.config['DATA_FILE_DIRECTORY'], '.default.txt'),'w').close()
 
 def get_default_dataset():
     check_default_indicator()
+    from main import app
     default_file_path = os.path.join(app.config['DATA_FILE_DIRECTORY'], '.default.txt')
     with open(default_file_path, 'r') as default_file:
         default = default_file.read()
     return default
 
 def available_datasets():
-        files = glob(os.path.join(app.config["DATA_FILE_DIRECTORY"],'*.json'))
-        default = get_default_dataset()
-        output = []
-        for file in files:
-            filename = file.rsplit('/')[-1]
-            label = f'{filename[:-5]} (Default)' if filename == default else filename[:-5]
-            element = (filename, label)
-            output.append(element)
-        output.reverse()
-        return output
+    from main import app
+    files = glob(os.path.join(app.config["DATA_FILE_DIRECTORY"],'*.json'))
+    default = get_default_dataset()
+    output = []
+    for file in files:
+        filename = file.rsplit('/')[-1]
+        label = f'{filename[:-5]} (Default)' if filename == default else filename[:-5]
+        element = (filename, label)
+        output.append(element)
+    output.reverse()
+    return output
 
 def check_json_format(file):
     if not '.' in file.filename:
@@ -58,6 +61,7 @@ def validate_json_contents(file):
 
 def store_data_file(file, default:bool=None):
     from admin.views import get_id_from_cookie
+    from main import app
     check_default_indicator()
     timestamp = datetime.utcnow()
     filename = '.'.join([timestamp.strftime('%Y%m%d%H%M%S'),'json'])
@@ -201,6 +205,7 @@ def get_time_options():
     return time_options
 
 def get_datasets():
+    from main import app, db
     files = glob(os.path.join(app.config["DATA_FILE_DIRECTORY"],'*.json'))
     data = []
     if files: