Update remotedbserver.lua

remotedbserver.lua

@@ -1,21 +1,16 @@
-if not fs.exists("data.db") then
-    local file = fs.open("data.db", "w")
-    file.write("{}")
-    file.close()
-end
-local file = fs.open("data.db","r+")
 local eplib = require("entrypointlib")
-if not file then error("failed to open db file") end
 
 local function readTable()
-    file.seek("set")
+    local file = fs.open("data.db","r")
+    if not file then error("failed to open db file") end
     return textutils.unserialise(file.readAll() or "{}") or {}
 end
 
 local function writeTable(t)
-    file.seek("set")
+    local file = fs.open("data.db", "w")
+    if not file then error("failed to open db file") end
     file.write(textutils.serialise(t))
-    file.flush()
+    file.close()
 end
 
 local function receive()