Wip backend (#4)

* feat: Add new API handlers for user, project, and task management; update package dependencies

* feat: Update .gitignore, add Lambda layer configuration, and refactor DynamoDB handlers to use AWS SDK v3

* feat: Update serverless configuration and refactor API handlers to improve error handling and response structure

* feat: Add Cognito user pool name parameter and update API handlers to include CORS headers

* feat: Update task and project ID formats, add populateSeedData function, and enhance user ID handling

* feat: Update image source paths to use S3 public URL for profile and task attachments

tasker-server/src/handlers/getUser.ts

@@ -0,0 +1,44 @@
+import { DynamoDBClient } from "@aws-sdk/client-dynamodb";
+import { DynamoDBDocument, QueryCommandInput } from "@aws-sdk/lib-dynamodb";
+
+const SLS_REGION = process.env.SLS_REGION;
+const TASKER_USER_TABLE_NAME = process.env.TASKER_USER_TABLE_NAME || "";
+
+const client = new DynamoDBClient({ region: SLS_REGION });
+const docClient = DynamoDBDocument.from(client);
+
+export const handler = async (event: any): Promise<any> => {
+  const { cognitoId } = event.pathParameters;
+  try {
+    const params: QueryCommandInput = {
+      TableName: TASKER_USER_TABLE_NAME,
+      KeyConditionExpression: "category = :category AND cognitoId = :cognitoId",
+      ExpressionAttributeValues: {
+        ":category": "users",
+        ":cognitoId": cognitoId,
+      },
+    };
+
+    const user = await docClient.query(params);
+
+    return {
+      statusCode: 200,
+      headers: {
+        "Content-Type": "application/json",
+        "Access-Control-Allow-Origin": "*",
+      },
+      body: JSON.stringify(user.Items?.[0] || {}),
+    };
+  } catch (error: any) {
+    return {
+      statusCode: 500,
+      headers: {
+        "Content-Type": "application/json",
+        "Access-Control-Allow-Origin": "*",
+      },
+      body: JSON.stringify({
+        message: `Error retrieving user: ${error.message}`,
+      }),
+    };
+  }
+};