docker-compose/k8s: Limit segment-coverage start/end times

Instead of defaulting to oldest/newest.

docker-compose.jsonnet

@@ -133,6 +133,11 @@
   // The timestamp corresponding to 00:00 in bustime
   bustime_start:: "1970-01-01T00:00:00Z",
 
+  // The timestamps to start/end segment coverage maps at.
+  // Generally 1 day before and 7 days after bus start.
+  coverage_start:: "1969-12-31T00:00:00Z",
+  coverage_end:: "1970-01-07T00:00:00Z",
+
   // Max hours ago to backfill, ie. do not backfill for times before this many hours ago.
   // Set to null to disable.
   backfill_max_hours_ago:: 24 * 30 * 6, // approx 6 months
@@ -323,6 +328,8 @@
       [
         "--base-dir", "/mnt",
         "--qualities", std.join(",", $.qualities),
+        "--first-hour", $.coverage_start,
+        "--last-hour", $.coverage_end,
       ],
       // Mount the segments directory at /mnt
       volumes: ["%s:/mnt" % $.segments_path],

k8s.jsonnet

@@ -81,6 +81,11 @@
     // The timestamp corresponding to 00:00 in bustime
     bustime_start: "1970-01-01T00:00:00Z",
 
+    // The timestamps to start/end segment coverage maps at.
+    // Generally 1 day before and 7 days after bus start.
+    coverage_start: "1969-12-31T00:00:00Z",
+    coverage_end: "1970-01-07T00:00:00Z",
+
     // Max hours ago to backfill, ie. do not backfill for times before this many hours ago.
     // Set to null to disable.
     backfill_max_hours_ago: 24 * 30 * 6, // approx 6 months
@@ -228,6 +233,8 @@
       "--base-dir", "/mnt",
       "--qualities", std.join(",", $.config.qualities),
       "--metrics-port", "80",
+      "--first-hour", $.config.coverage_start,
+      "--last-hour", $.config.coverage_end,
     ]),
     // Thrimshim acts as an interface between the thrimbletrimmer editor and the database
     // It is needed for thrimbletrimmer to be able to get unedited videos and submit edits