setup firebase

src/components/User.js

@@ -0,0 +1,43 @@
+import React from "react";
+import fire from "../fire.js";
+
+class User extends React.Component {
+  state = {
+    name: ""
+  };
+
+  updateInput = e => {
+    this.setState({
+      [e.target.name]: e.target.value
+    });
+  };
+
+  addUser = e => {
+    e.preventDefault();
+    const db = fire.firestore();
+    db.settings({
+      timestampsInSnapshots: true
+    });
+    const userRef = db.collection("users").add({
+      name: this.state.name
+    });
+    this.setState({ name: "" });
+  };
+
+  render() {
+    return (
+      <form onSubmit={this.addUser}>
+        <input
+          type="text"
+          name="name"
+          placeholder="Name"
+          onChange={this.updateInput}
+          value={this.state.name}
+        />
+        <button type="submit">Submit</button>
+      </form>
+    );
+  }
+}
+
+export default User;