Add support for .env configuration and privacy page (closes #44)

.env.example

@@ -0,0 +1,35 @@
+ADDRESS=0.0.0.0
+PORT=3000
+FIBER_PREFORK=false
+IMGUR_CLIENT_ID=546c25a59c58ad7
+
+# Instance privacy
+# For more information, see https://codeberg.org/librarian/librarian/wiki/Instance-privacy
+# Required to be on the instance list.
+
+# Link to a privacy policy (optional)
+PRIVACY_POLICY=
+# Explain how this data is used/why it is collected (optional)
+PRIVACY_MESSAGE=
+# Country where instance is located. Leave blank if running on Tor without clearnet.
+PRIVACY_COUNTRY=
+# Hosting provider or ISP name. Leave blank if running on Tor without clearnet.
+PRIVACY_PROVIDER=
+# Set to true if you use Cloudflare (using Cloudflare only as DNS (gray cloud icon), set to false)
+PRIVACY_CLOUDFLARE=false
+
+# These settings are for NGINX without data collection disabled.
+# Instructions for other reverse proxies and to disable data collection:
+# https://codeberg.org/librarian/librarian/wiki/Instance-privacy
+
+# Set to true if no data is collected. (overrides all other options)
+PRIVACY_NOT_COLLECTED=false
+# IP address
+PRIVACY_IP=true
+# Request URL
+PRIVACY_URL=true
+# Device Type (User agent)
+PRIVACY_DEVICE=true
+# If the data collection is only collected when there is an error and only stored for
+# a short amount of time while diagnosing an issue.
+PRIVACY_DIAGNOSTICS=false