Rust backend setup

backend/migrations/create_metars/down.sql

@@ -0,0 +1 @@
+DROP TABLE metars;

backend/migrations/create_metars/up.sql

@@ -0,0 +1,24 @@
+CREATE TABLE "metars" (
+    id SERIAL PRIMARY KEY,
+    icao TEXT NOT NULL,
+    raw_text TEXT NOT NULL,
+    station_id TEXT NOT NULL,
+    observation_time TEXT NOT NULL,
+    latitude INTEGER NOT NULL,
+    longitude INTEGER NOT NULL,
+    temp_c DOUBLE PRECISION NOT NULL,
+    dewpoint_c DOUBLE PRECISION NOT NULL,
+    wind_dir_degrees INTEGER NOT NULL,
+    wind_speed_kt INTEGER NOT NULL,
+    visibility_statute_mi TEXT NOT NULL,
+    altim_in_hg DOUBLE PRECISION NOT NULL,
+    sea_level_pressure_mb DOUBLE PRECISION,
+    wx_string TEXT,
+    flight_category TEXT,
+    three_hr_pressure_tendency_mb DOUBLE PRECISION,
+    metar_type TEXT,
+    max_t_c DOUBLE PRECISION,
+    min_t_c DOUBLE PRECISION,
+    precip_in DOUBLE PRECISION,
+    elevation_m INTEGER
+)