[chores] Neutral defaults for locale settings

Made default locale, timezone and other settings more neutral.

(cherry picked from commit 2d562f2)

Author: nemesifier

.env

@@ -26,7 +26,7 @@ UWSGI_THREADS=2
 UWSGI_LISTEN=100
 # Additional
 SSL_CERT_MODE=SelfSigned
-TZ=Asia/Kolkata
+TZ=UTC
 CERT_ADMIN_EMAIL=example@example.org
 DJANGO_LANGUAGE_CODE=en-gb
 DB_NAME=openwisp
@@ -35,9 +35,9 @@ OPENWISP_GEOCODING_CHECK=True
 # X509 default CA & Certs Information
 X509_NAME_CA=default
 X509_NAME_CERT=default
-X509_COUNTRY_CODE=IN
-X509_STATE=Delhi
-X509_CITY=New Delhi
+X509_COUNTRY_CODE=CH
+X509_STATE=Geneva
+X509_CITY=Geneva
 X509_ORGANIZATION_NAME=OpenWISP
 X509_ORGANIZATION_UNIT_NAME=OpenWISP
 X509_EMAIL=certificate@example.com

docs/user/settings.rst

@@ -1040,22 +1040,22 @@ X509 Certificates
 - **Explanation:** ISO code of the country of issuance of the certificate.
 - **Valid Values:** Country code, see list `here
   <https://countrycode.org/>`__.
-- **Default:** ``IN``.
+- **Default:** ``CH``.
 
 ``X509_STATE``
 ~~~~~~~~~~~~~~
 
 - **Explanation:** Name of the state / province of issuance of the
   certificate.
 - **Valid Values:** STRING.
-- **Default:** ``Delhi``.
+- **Default:** ``Geneva``.
 
 ``X509_CITY``
 ~~~~~~~~~~~~~
 
 - **Explanation:** Name of the city of issuance of the certificate.
 - **Valid Values:** STRING.
-- **Default:** ``New Delhi``.
+- **Default:** ``Geneva``.
 
 ``X509_ORGANIZATION_NAME``
 ~~~~~~~~~~~~~~~~~~~~~~~~~~

images/openwisp_base/Dockerfile

@@ -157,9 +157,9 @@ ENV DASHBOARD_APP_SERVICE=dashboard \
     VPN_CLIENT_NAME=default-management-vpn \
     X509_NAME_CA=default \
     X509_NAME_CERT=default \
-    X509_COUNTRY_CODE=IN \
-    X509_STATE=Delhi \
-    X509_CITY="New Delhi" \
+    X509_COUNTRY_CODE=CH \
+    X509_STATE=Geneva \
+    X509_CITY=Geneva \
     X509_ORGANIZATION_NAME=OpenWISP \
     X509_ORGANIZATION_UNIT_NAME=OpenWISP \
     X509_EMAIL=certificate@example.com \