Initial history collector implementation

.env.example

@@ -0,0 +1,8 @@
+# Create with: cp .env.example .env ; then replace the placeholder.
+# Generate: python3 -c "import secrets; print(secrets.token_urlsafe(32))"
+API_TOKEN=REPLACE_WITH_A_RANDOM_32+_CHARACTER_TOKEN
+# Optional. Leave empty to keep all data only in SQLite.
+DISCORD_WEBHOOK_URL=
+DATA_DIR=/data
+MAX_VISITS_PER_REQUEST=100
+LOG_LEVEL=INFO