move metno initialization earlier so less work is done if the environment variable is not set

src/main.zig

@@ -9,6 +9,7 @@ const GeoCache = @import("location/GeoCache.zig");
 const Airports = @import("location/Airports.zig");
 const Resolver = @import("location/resolver.zig").Resolver;
 const GeoLite2 = @import("location/GeoLite2.zig");
+const version = @import("build_options").version;
 
 pub fn main() !u8 {
     var gpa = std.heap.GeneralPurposeAllocator(.{}){};
@@ -18,7 +19,7 @@ pub fn main() !u8 {
     const cfg = try Config.load(allocator);
     defer cfg.deinit(allocator);
 
-    std.log.info("wttr starting on {s}:{d}", .{ cfg.listen_host, cfg.listen_port });
+    std.log.info("wttr version {s} starting on {s}:{d}", .{ version, cfg.listen_host, cfg.listen_port });
     std.log.info("Cache size: {d}", .{cfg.cache_size});
     std.log.info("Cache dir: {s}", .{cfg.cache_dir});
     std.log.info("GeoLite2 path: {s}", .{cfg.geolite_path});
@@ -28,6 +29,12 @@ pub fn main() !u8 {
         std.log.info("Geocache: in-memory only", .{});
     }
 
+    var metno = MetNo.init(allocator, null) catch |err| {
+        if (err == MetNo.MissingIdentificationError) return 1;
+        return err;
+    };
+    defer metno.deinit();
+
     // Ensure GeoLite2 database exists
     try GeoLite2.ensureDatabase(allocator, cfg.geolite_path);
 
@@ -67,12 +74,6 @@ pub fn main() !u8 {
     });
     defer rate_limiter.deinit();
 
-    var metno = MetNo.init(allocator, null) catch |err| {
-        if (err == MetNo.MissingIdentificationError) return 1;
-        return err;
-    };
-    defer metno.deinit();
-
     var server = try Server.init(allocator, cfg.listen_host, cfg.listen_port, .{
         .provider = metno.provider(cache),
         .resolver = &resolver,