Created Room model, set up database connection

back/.env.example

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+DATABASE_URL="postgresql://"
+PORT=8081

back/.gitignore

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+certs/
+src/db/config.ts
+.env

back/src/db/config.example.ts

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+export const config = {
+  host: "",
+  username: "",
+  password: "",
+  database: "",
+};

back/src/db/index.ts

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+import { Connection, createConnection } from "typeorm";
+import fs from "fs";
+
+import { Room } from "./model";
+import { config } from "./config";
+
+export const connect = () =>
+  createConnection({
+    ...config,
+    type: "cockroachdb",
+    port: 26257,
+    ssl: {
+      ca: fs.readFileSync("certs/cc-ca.crt").toString(),
+    },
+    synchronize: true,
+    logging: false,
+    entities: [Room],
+  });
+
+export { Room };

back/src/db/model.ts

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+import { Entity, Column, PrimaryGeneratedColumn } from "typeorm";
+
+@Entity()
+export class Room {
+  @PrimaryGeneratedColumn()
+  id: number;
+
+  @Column({
+    length: 100,
+  })
+  title: string;
+
+  @Column()
+  free: boolean;
+
+  @Column()
+  x: number;
+
+  @Column()
+  y: number;
+
+  @Column()
+  width: number;
+
+  @Column()
+  height: number;
+}