Add spring backend

backend-spring/build/resources/main/db/migration/V1__initial.sql

@@ -0,0 +1,42 @@
+CREATE TABLE users
+(
+    id      SERIAL PRIMARY KEY,
+    name    TEXT             NOT NULL,
+    weight  DOUBLE PRECISION NOT NULL DEFAULT 10.0,
+    balance BIGINT           NOT NULL DEFAULT 0
+);
+
+CREATE TABLE history
+(
+    id          SERIAL PRIMARY KEY,
+    user_id     INTEGER NOT NULL,
+    timestamp   BIGINT  NOT NULL,
+    amount      BIGINT  NOT NULL,
+    description TEXT
+);
+
+CREATE TABLE allowances
+(
+    id      SERIAL PRIMARY KEY,
+    user_id INTEGER          NOT NULL,
+    name    TEXT             NOT NULL,
+    target  BIGINT           NOT NULL,
+    balance BIGINT           NOT NULL DEFAULT 0,
+    weight  DOUBLE PRECISION NOT NULL,
+    colour  INTEGER
+);
+
+CREATE TABLE tasks
+(
+    id        SERIAL PRIMARY KEY,
+    name      TEXT   NOT NULL,
+    reward    BIGINT NOT NULL,
+    assigned  INTEGER,
+    schedule  TEXT,
+    completed BIGINT,
+    next_run  BIGINT
+);
+
+INSERT INTO users (name)
+VALUES ('Seeseemelk'),
+       ('Huffle');