diff --git a/API.apib b/API.apib
new file mode 100644
index 0000000..695366a
--- /dev/null
+++ b/API.apib
@@ -0,0 +1,27 @@
+#Group Bookings
+
+## Bookings Collection [/time{?cardID}]
+
+### List all bookings for specific card_id [GET]
+
++ Parameters
+    + cardID:test_card (string) - the id of the rfid card
+
++ Response 200 (application/json)
+
+        [
+            {
+                "cradID": "test_card",
+                "readerID": "test_reader",
+                "bookingTyp": 2,
+                "loggedTime": "2024-09-05T08:37:53.117641Z",
+                "id": 5
+            },
+            {
+                "cradID": "test_card",
+                "readerID": "mytest",
+                "bookingTyp": 1,
+                "loggedTime": "2024-09-05T08:51:12.670827Z",
+                "id": 6
+            },
+        ]
diff --git a/Docker/docker-compose.yml b/Docker/docker-compose.yml
index a9403e4..1a305d8 100644
--- a/Docker/docker-compose.yml
+++ b/Docker/docker-compose.yml
@@ -31,3 +31,5 @@ services:
       EXPOSED_PORT: ${EXPOSED_PORT}
     ports:
       - ${EXPOSED_PORT}:8080
+    depends_on:
+      - db
diff --git a/Readme.md b/Readme.md
index 4b80e1b..bf99b43 100644
--- a/Readme.md
+++ b/Readme.md
@@ -5,9 +5,81 @@ bis jetzt ein einfaches Backend mit PostgreSQL Datenbank und GO Webserver um Arb
 ## Installation
 
 ```bash
-git clone https://git.letsstein.de/tom/arbeitszeitmessung
+git clone https://git.letsstein.de/tom/arbeitszeitmessung arbeitszeitmessung
 
-# cd in das Verzeichnis
-
-cd Docker
+cd arbeitszeitmessung/Docker
+# .env Datei anpassen
 docker compose up -d
+```
+
+## API
+Nutzung der API
+
+### Buchungen [/time]
+
+#### [GET] Anfrage
+Parameter: cardID (string)
+Antwort: `200`
+```json
+[
+    {
+        "cradID": "test_card",
+        "readerID": "test_reader",
+        "bookingTyp": 2,
+        "loggedTime": "2024-09-05T08:37:53.117641Z",
+        "id": 5
+    },
+    {
+        "cradID": "test_card",
+        "readerID": "mytest",
+        "bookingTyp": 1,
+        "loggedTime": "2024-09-05T08:51:12.670827Z",
+        "id": 6
+    },
+]
+```
+Antwort `500`
+Serverfehler
+
+#### [PUT] Anfrage
+Parameter: id (int)
+Body: (veränderte Parameter)
+```json
+{
+    "cradID": "test_card",
+    "readerID": "mytest",
+    "bookingTyp": 1,
+    "loggedTime": "2024-09-05T08:51:12.670827Z",
+}
+```
+ Antwort `200`
+ ```json
+{
+    "cradID": "test_card",
+    "readerID": "mytest",
+    "bookingTyp": 1,
+    "loggedTime": "2024-09-05T08:51:12.670827Z",
+    "id": 6
+}
+ ```
+
+### Neue Buchung [/time/new]
+#### [PUT] Anfrage
+Parameter:
+- cardID (string)
+- readerID (string)
+- bookingType (string)
+
+Antwort `202` Akzeptiert und eingefügt
+```json
+{
+    "cradID": "test_card",
+    "readerID": "mytest",
+    "bookingTyp": 1,
+    "loggedTime": "2024-09-05T08:51:12.670827Z",
+    "id": 6
+}
+```
+
+Antwort `409` Konflikt
+Die vorherige Buchung am selben Tag hat den gleichen Buchungstyp