First version

backend/migrations/1_initial.sql

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+CREATE TABLE IF NOT EXISTS units (
+  id BIGSERIAL PRIMARY KEY,
+  name VARCHAR(255),
+  short VARCHAR(255),
+  UNIQUE(name),
+  UNIQUE(short)
+);
+
+CREATE TABLE IF NOT EXISTS food (
+  id BIGSERIAL PRIMARY KEY,
+  version BIGINT,
+  name VARCHAR(255),
+  unit_id BIGINT REFERENCES units(id),
+  UNIQUE(name, version)
+);
+
+CREATE TABLE IF NOT EXISTS nutritional_kind (
+  id BIGSERIAL PRIMARY KEY,
+  name VARCHAR(255),
+  unit_id BIGINT REFERENCES units(id),
+  UNIQUE (name)
+);
+
+CREATE TABLE IF NOT EXISTS food_base (
+  food_id BIGINT REFERENCES food(id),
+  kind_id BIGINT REFERENCES nutritional_kind(id),
+  value FLOAT,
+  PRIMARY KEY (food_id, kind_id)
+);
+
+INSERT INTO units(name, short) VALUES('Gram', 'g');
+INSERT INTO units(name, short) VALUES('Milliliter', 'ml');
+
+CREATE TABLE IF NOT EXISTS tracking (
+  id BIGSERIAL PRIMARY KEY,
+  food_id BIGINT REFERENCES food(id),
+  quantity FLOAT,
+  ts BIGINT
+);